diff --git a/test/test_coroutine.cpp b/test/test_coroutine.cpp
index 5fd7449..b4a6bcb 100644
--- a/test/test_coroutine.cpp
+++ b/test/test_coroutine.cpp
@@ -522,6 +522,7 @@ void test_invalid_result()
     try
     {
         int i = coro.get();
+        (void)i;
     }
     catch ( coro::invalid_result const& e)
     {